Why do my 1985 Nissan 300ZX squeals when I back up?

SOURCE: car wont start

Fuel delivery must be confirmed with a fuel pressure gauge on this vehicle. Disconnecting the fuel line and cranking the engine to see fuel shooting out does not confirm pressure, it only confirms fuel delivery. Remember you need both fuel delivery and pressure. On this vehicle if the psi is off by just one number that's enough to keep it from starting. Also replacing the coil and rotor (as you stated) does not confirm that spark is reaching the plugs. Confirm that both spark and adequate fuel pressure are reaching ALL the spark plugs.

SOURCE: Brake light stays on at all times, ive changed pedal switch

Change the brake light switch.Located at the pedal

Mike Butler

• 6674 Answers
• Posted on Jul 20, 2009

SOURCE: fuel pump relay

Try drivers side in rear hatch, ahead of wheel well area, behind trim panel.

SOURCE: gas gage dont work on my 1985 nissan 300zx

there is a sensor for the gas gauge in the hatch of the car its a little 4x4 metal box about 6inches up from the access for the fuel pump. the cmmon leaks in the car seem to target this guy

SOURCE: wiring diagram for 1985 nissan

Check out this link. You will find it.

http://www.nicoclub.com/FSM/300zx/